Synthesis and Study of Optical Characteristics of Ti0.91O2/CdS Hybrid Sphere Structures

Lingbin Kong; Qinfeng Xu; Meng Zhang; Dehua Wang; Mingliang Liu; Lei Zhang; Mengmeng Jiao; Honggang Wang; Chuanlu Yang

doi:10.1186/s11671-018-2488-3

Synthesis and Study of Optical Characteristics of Ti_0.91O₂/CdS Hybrid Sphere Structures

Nanoscale Res Lett. 2018 Mar 7;13(1):80. doi: 10.1186/s11671-018-2488-3.

Authors

Lingbin Kong¹, Qinfeng Xu², Meng Zhang¹, Dehua Wang¹, Mingliang Liu¹, Lei Zhang¹, Mengmeng Jiao¹, Honggang Wang¹, Chuanlu Yang³

Affiliations

¹ School of Physics and Optoelectronic Engineering, Ludong University, Yantai, 264025, China.
² School of Physics and Optoelectronic Engineering, Ludong University, Yantai, 264025, China. xuqf5678@163.com.
³ School of Physics and Optoelectronic Engineering, Ludong University, Yantai, 264025, China. yangchuanlu@126.com.

Abstract

The optical properties of alternating ultrathin Ti_0.91O₂ nanosheets and CdS nanoparticle hybrid spherical structures designed by the layer-by-layer (LBL) assembly technique are investigated. From the photoluminescence (PL) spectral measurements on the hybrid spherical structures, a spectrum-shifted fluorescence emission occurs in this novel hybrid material. The time-resolved PL measurements exhibit a remarkably increased PL lifetime of 3.75 ns compared with only Ti_0.91O₂ spheres or CdS nanoparticles. The novel results were attributed to the enhanced electron-hole separation due to the new type II indirect optical transition mechanism between Ti_0.91O₂ and CdS in a charge-separated configuration.

Keywords: CdS nanoparticles; Hybrid spherical structures; Indirect optical transitions; Ti0.91O2 nanosheets.

Abstract

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